To find out more information on how treating impotence with vardenafil in comparison to placebo affects the quality of life (QoL) of men and their partners. Subjects will receive 10mg vardenafil or placebo for 4 weeks followed by an 8 week period when the dose of vardenafil may be reduced to 5mg or increased to 20mg. Subjects will then receive their 'preferred' dose for 14 weeks. During this time Quality of Life Measures will be collected via questionnaires

The relationship between the change from baseline score for; EF domain, SEP2, SEP3 and GEQ with that for ED-QoL and EDITS will be explored for the vardenafil 10mg and 20mg groups respectively [ Time Frame: Baseline and at week 18 (after 4 weeks of preferred treatment). ] [ Designated as safety issue: No ]

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Please refer to this study by its ClinicalTrials.gov identifier: NCT00661700